Combined burglar-alarm and door-bell



J. BERKEY & W. 1-; KELLER;- Q Combined Burglar-Alarm an'd D oor-Bell.No. 224,26 8. Patenfd Feb. 10,1880.

ATTOH/VE Y.

NFETERS. PHOTO-LITIMOGRAPHER,'WASHINGTON, b C.

UNITED STATES PATENT OFFICE.

OHN BERKEY ANp -WILLIAM n, KELLER, OFVEASTON, PENNSYLVANIA.

COMBINED B..U*RGLAR'-ALARM AND DOOR-BELL.

SPECIFICATION forming part of Letters Patent No. 224,2 8, dated February10, 1880.

To all whom it mag concern:

and useful Improvement in Burglar-Alarms and Door-Bells, of whichspecification.

may also be used as a door-bell.

The object'of our invention is to improve that class of burglar-alarmswhich may be used as a door-bell, &c., and which is simple,

I efficient, and cheap, and may be attached to and that is readilythrown in and out of gear.

The invention consists in certain novel combinations, as hereinafter setforth and claimed, of the following devices, viz: a gong to be struck bytwo hammers, one at each end of acontinuous spring; a lever toothedatone end to operate the alarm, and having a notched opening at theother end to fitthe hereinafter-described center-piece, whereby it isattached to the door-knob when used as a burg- 0 lar-alarm on a door,and the lever operated by pins or other arrangement when used on .awindow, and by a knob or handle when. used as a door-bell; acenter-piece with a point fitting in the aforesaid opening in the 3 5lever, so constructed that the lever and gong may be set at any anglefrom the knob or handle, or the lever set at any angle with the gong;and, finally, the stop to throw the apparatus out of gear.

In the accompanying drawings, in which similar letters of referenceindicate like parts,

the apparatus being represented as attached to a door as aburglar-alarm, Figure 1 is a plan of our invention with the gong andknob,

removed. Fig. 2 is a sectional view on line 0 opening in the lever toreceive the center-piece, from which drawings and the accompanying thefollowingisa" attach the apparatus to the door. The invention relates toburglar-alarms to IO be attached to doors or windows, and whichApplication filed August 27, 1879.

= description the other applications of our in Be it known "that we, JOHBERKEYand WILLIAM F. KEL ER, both of the borough of 1 Easton, in thecounty of Northampton and" 5 State of Pennsylvania, have invented anewvention are readily understood. Y

E and F are the hammers attached to each end.- of the continuous springG H I J K. N Pisthe stop, turning on a pivot at O. L L is the postsupporting the gong. M isthe hole through which the screw M passes to Oand D are pins around which the spring passes. A and B are pins againstwhich the spring strikes when drawn back and released, makin g the blowsof the hammers sharp and quick.

,S is the center-piece with an opening, B,

through which the spindle Rof the knob 1 passes. This center-piece has apoint, a, which fits in a like opening in theleverZ', for the purpose ofsetting the ,device at any angle; Z is the lever, provided with teeth,as

When the door is closed the different parts are in the positions shownin Fig. 1. Then when the handle is turned--e. 9., to the leftthe tooth Qengages the end of the spring G g and pushes it to G, when the spring isin the position shown by the dotted lines G I J K; then the lever,passing still farther to the left, releases the spring, and it fliesback, striking the pin B, which causes the hammer F to strike the gongUV with a sudden sharp blow,

and prevents it from resting against and stopdiiferent patterns, if thedevice were constructed,-as in Fig. 1, with the diagonal of the spindleR passing through the center of the apparatus and without ready means,of adjust- IOO ing it to the door and lock or window, our inventionwould be of little practical utility; but we obviate this difficulty bythe construc tion of the center-piece S. When it is found necessary toset the apparatus at a (lifl'erent angle, all that need be done is tocut a notch with a three-cornered file at the proper place in the lever,as at a or a, to fit the point a, of the center-piece.

The lever Z may be constructed with a different number of teeth, or withthe same arranged in a different manner, or may be a whole circleinstead of an are; but we regard that shown in the drawings as the bestform.

By'pushing the stop N P to P it thrusts the spring to one side, asshownby the dotted lines, and the teeth of the lever pass G without engagingit, so that the door or window may be opened without giving an alarm.When attached to a window as a burglar-- alarm the device may be placedon the frame of the window and the lever pivoted, as at Y, with pins onthe sash, as at c and d, which strike the lever when the sash is raisedor lowered, so as to cause the alarm to be struck, as above described;or it may be placed in other positions and operated by suitable devices.

What we claim is- 1. The combination of the continuous spring G HI J K,with a hammer at each end, the pins A, B, O, and D, the lever Z, withthe teeth Q, Q, Q, and Q and the notched. opening S a, the center-pieceS, with its point a, and the stop N P, substantially as and for thepurposes above described.

2. In combination with the bell striking mechanism of a burglar-alarm,the lever Z, with teeth Q, Q, Q, and Q and notched opening S a, for theadjustment of the apparatus, substantially as and for the purposes abovedescribed.

3. The combination of the lever Z, with the teeth Q, Q, Q, and Q and thenotched opening S a, and the center-piece S, with the point a, for theadjustment of the apparatus, substantially as and for the purposes abovedescribed.

4. The combination of a continuous spring, G H I J K, with a hammer ateach end, the lever Z, with the teeth Q, Q, Q, and Q and the notchedopening S a, and the centerpiece S, with its point a, substantially asand for the purposes above described.

5. The combination of the continuous spring G H I J K, with a hammer ateach end, the pins A, B, G, and D, the lever Z, with the teeth Q, Q, Q,and Q and the notched opening S a, and the center-piece S, with itspoint a, substantially as and for the purposes above described.

JOHN BERKEY. WM. F. KELLER.

Witnesses:

W. A. HORN, J NO. L. WILsoN.

